
<template>
  <ms-dialog
    fullscreen
    ok-btn="配置"
    title=""
    :dialog-visible="drawDialogVisible"
    @ok="handleSaveBaseForm"
    @close="handleCloseDialog"
  >
    <div class="container">
      <div class="left-board">
        <div class="logo-wrapper">
          <div class="logo">
            <img :src="logo" alt="logo"> Form Generator
            <a class="github" href="https://github.com/JakHuang/form-generator" target="_blank">
              <img src="https://github.githubassets.com/pinned-octocat.svg" alt>
            </a>
          </div>
        </div>
        <el-scrollbar class="left-scrollbar">
          <div class="components-list">
            <div v-for="(item, listIndex) in leftComponents" :key="listIndex">
              <div class="components-title">
                <svg-icon icon-class="component" />
                {{ item.title }}
              </div>
              <draggable
                class="components-draggable"
                :list="item.list"
                :group="{ name: 'componentsGroup', pull: 'clone', put: false }"
                :clone="cloneComponent"
                draggable=".components-item"
                :sort="false"
                @end="onEnd"
              >
                <div
                  v-for="(element, index) in item.list"
                  :key="index"
                  class="components-item"
                  @click="addComponent(element)"
                >
                  <div class="components-body">
                    <svg-icon :icon-class="element.__config__.tagIcon" />
                    {{ element.__config__.label }}
                  </div>
                </div>
              </draggable>
            </div>
          </div>
        </el-scrollbar>
      </div>

      <div class="center-board">
        <div class="action-bar">
          <el-button icon="el-icon-video-play" type="text" @click="confCode">
            代码配置
          </el-button>
          <el-button icon="el-icon-video-play" type="text" @click="run">
            运行
          </el-button>
          <el-button icon="el-icon-view" type="text" @click="showJson">
            查看json
          </el-button>
          <el-button icon="el-icon-download" type="text" @click="download">
            导出vue文件
          </el-button>
          <el-button class="copy-btn-main" icon="el-icon-document-copy" type="text" @click="copy">
            复制代码
          </el-button>
          <el-button class="delete-btn" icon="el-icon-delete" type="text" @click="empty">
            清空
          </el-button>
        </div>
        <el-scrollbar class="center-scrollbar">
          <el-row class="center-board-row" :gutter="formConf.gutter">
            <el-form
              :size="formConf.size"
              :label-position="formConf.labelPosition"
              :disabled="formConf.disabled"
              :label-width="formConf.labelWidth + 'px'"
            >
              <draggable class="drawing-board" :list="drawingList" :animation="340" group="componentsGroup">
                <draggable-item
                  v-for="(element, index) in drawingList"
                  :key="element.renderKey"
                  :drawing-list="drawingList"
                  :element="element"
                  :index="index"
                  :active-id="activeId"
                  :form-conf="formConf"
                  @activeItem="activeFormItem"
                  @copyItem="drawingItemCopy"
                  @deleteItem="drawingItemDelete"
                />
              </draggable>
              <div v-show="!drawingList.length" class="empty-info">
                从左侧拖入或点选组件进行表单设计
              </div>
            </el-form>
          </el-row>
        </el-scrollbar>
      </div>

      <right-panel
        :active-data="activeData"
        :form-conf="formConf"
        :show-field="!!drawingList.length"
        @tag-change="tagChange"
        :form-id="formId"
      />

      <form-drawer
        :visible.sync="drawerVisible"
        :form-data="formData"
        size="100%"
        :generate-conf="generateConf"
      />
      <json-drawer
        size="60%"
        :visible.sync="jsonDrawerVisible"
        :json-str="JSON.stringify(formData)"
        @refresh="refreshJson"
      />
      <code-type-dialog
        :visible.sync="dialogVisible"
        title="选择生成类型"
        :show-file-name="showFileName"
        @confirm="generate"
      />
      <input id="copyNode" type="hidden">
    </div>
  </ms-dialog>
</template>

<script>
import MsDialog from '@/common/dialog'

import { configTable } from '@/api/generCode'

import draggable from 'vuedraggable'
import { debounce } from 'throttle-debounce'
import { saveAs } from 'file-saver'
import beautifier from 'beautifier'
import ClipboardJS from 'clipboard'
import FormDrawer from './FormDrawer'
import JsonDrawer from './JsonDrawer'
import RightPanel from './RightPanel'
import {
  inputComponents, selectComponents, layoutComponents, formConf
} from '@/components/generator/config'
import { diyComp } from '@/diy/diyComp'
import {
  beautifierConf, titleCase
} from '@/utils/index'
import {
  makeUpHtml, vueTemplate, vueScript, cssStyle
} from '@/components/generator/html'
import { makeUpJs } from '@/components/generator/js'
import { makeUpCss } from '@/components/generator/css'
import drawingDefalut from '@/components/generator/drawingDefalut'
import logo from '@/assets/logo.png'
import CodeTypeDialog from './CodeTypeDialog'
import DraggableItem from './DraggableItem'
import {
  getDrawingList, saveDrawingList, getIdGlobal, saveIdGlobal, getFormConf
} from '@/utils/db'

let oldActiveId
let tempActiveData
const drawingListInDB = getDrawingList()
const formConfInDB = getFormConf()
const idGlobal = getIdGlobal()

export default {
  name: 'DrawForm',
  props: ['formId', 'drawDialogVisible'],
  components: {
    draggable,
    FormDrawer,
    JsonDrawer,
    RightPanel,
    CodeTypeDialog,
    DraggableItem,
    MsDialog
  },
  data() {
    return {
      logo,
      idGlobal,
      formConf,
      inputComponents,
      selectComponents,
      layoutComponents,
      diyComp,
      labelWidth: 100,
      drawingList: drawingDefalut,
      drawingData: {},
      activeId: drawingDefalut[0].formId,
      drawerVisible: false,
      formData: {},
      dialogVisible: false,
      jsonDrawerVisible: false,
      generateConf: null,
      showFileName: false,
      activeData: drawingDefalut[0],
      saveDrawingListDebounce: debounce(340, saveDrawingList),
      saveIdGlobalDebounce: debounce(340, saveIdGlobal),
      leftComponents: [
        {
          title: '输入型组件',
          list: inputComponents
        },
        {
          title: '选择型组件',
          list: selectComponents
        },
        {
          title: '布局型组件',
          list: layoutComponents
        },
        {
          title: '自定义组件',
          list: diyComp
        }
      ]
    }
  },
  computed: {
  },
  watch: {
    // eslint-disable-next-line func-names
    'activeData.__config__.label': function (val, oldVal) {
      if (
        this.activeData.placeholder === undefined ||
        !this.activeData.__config__.tag ||
        oldActiveId !== this.activeId
      ) {
        return
      }
      this.activeData.placeholder = this.activeData.placeholder.replace(oldVal, '') + val
    },
    activeId: {
      handler(val) {
        oldActiveId = val
      },
      immediate: true
    },
    drawingList: {
      handler(val) {
        this.saveDrawingListDebounce(val)
        if (val.length === 0) this.idGlobal = 100
      },
      deep: true
    },
    idGlobal: {
      handler(val) {
        this.saveIdGlobalDebounce(val)
      },
      immediate: true
    }
  },
  mounted() {
    if (Array.isArray(drawingListInDB) && drawingListInDB.length > 0) {
      this.drawingList = drawingListInDB
    } else {
      this.drawingList = drawingDefalut
    }
    this.activeFormItem(this.drawingList[0])
    if (formConfInDB) {
      this.formConf = formConfInDB
    }

    const clipboard = new ClipboardJS('#copyNode', {
      text: trigger => {
        const codeStr = this.generateCode()
        this.$notify({
          title: '成功',
          message: '代码已复制到剪切板，可粘贴。',
          type: 'success'
        })
        return codeStr
      }
    })
    clipboard.on('error', e => {
      this.$message.error('代码复制失败')
    })
  },
  methods: {
    activeFormItem(element) {
      this.activeData = element
      this.activeId = element.__config__.formId
    },
    onEnd(obj) {
      if (obj.from !== obj.to) {
        this.activeData = tempActiveData
        this.activeId = this.idGlobal
      }
    },
    addComponent(item) {
      const clone = this.cloneComponent(item)
      this.drawingList.push(clone)
      this.activeFormItem(clone)
    },
    cloneComponent(origin) {
      const clone = JSON.parse(JSON.stringify(origin))
      const config = clone.__config__
      config.formId = ++this.idGlobal
      config.span = formConf.span
      config.renderKey = +new Date() // 改变renderKey后可以实现强制更新组件
      if (config.layout === 'colFormItem') {
        clone.__vModel__ = `field${this.idGlobal}`
        clone.placeholder !== undefined && (clone.placeholder += config.label)
      } else if (config.layout === 'rowFormItem') {
        config.componentName = `row${this.idGlobal}`
        config.gutter = this.formConf.gutter
      }
      tempActiveData = clone
      return tempActiveData
    },
    AssembleFormData() {
      this.formData = {
        fields: JSON.parse(JSON.stringify(this.drawingList)),
        ...this.formConf
      }
    },
    generate(data) {
      const func = this[`exec${titleCase(this.operationType)}`]
      this.generateConf = data
      func && func(data)
    },
    execRun(data) {
      this.AssembleFormData()
      this.drawerVisible = true
    },
    execDownload(data) {
      const codeStr = this.generateCode()
      const blob = new Blob([codeStr], { type: 'text/plain;charset=utf-8' })
      saveAs(blob, data.fileName)
    },
    execCopy(data) {
      document.getElementById('copyNode').click()
    },
    empty() {
      this.$confirm('确定要清空所有组件吗？', '提示', { type: 'warning' }).then(
        () => {
          this.drawingList = []
          this.idGlobal = 100
        }
      )
    },
    drawingItemCopy(item, parent) {
      let clone = JSON.parse(JSON.stringify(item))
      clone = this.createIdAndKey(clone)
      parent.push(clone)
      this.activeFormItem(clone)
    },
    createIdAndKey(item) {
      const config = item.__config__
      config.formId = ++this.idGlobal
      config.renderKey = +new Date()
      if (config.layout === 'colFormItem') {
        item.__vModel__ = `field${this.idGlobal}`
      } else if (config.layout === 'rowFormItem') {
        config.componentName = `row${this.idGlobal}`
      }
      if (Array.isArray(config.children)) {
        config.children = config.children.map(childItem => this.createIdAndKey(childItem))
      }
      return item
    },
    drawingItemDelete(index, parent) {
      parent.splice(index, 1)
      this.$nextTick(() => {
        const len = this.drawingList.length
        if (len) {
          this.activeFormItem(this.drawingList[len - 1])
        }
      })
    },
    generateCode() {
      const { type } = this.generateConf
      this.AssembleFormData()
      const script = vueScript(makeUpJs(this.formData, type))
      const html = vueTemplate(makeUpHtml(this.formData, type))
      const css = cssStyle(makeUpCss(this.formData))
      return beautifier.html(html + script + css, beautifierConf.html)
    },
    showJson() {
      this.AssembleFormData()
      this.jsonDrawerVisible = true
    },
    download() {
      this.dialogVisible = true
      this.showFileName = true
      this.operationType = 'download'
    },
    run() {
      this.dialogVisible = true
      this.showFileName = false
      this.operationType = 'run'
    },
    copy() {
      this.dialogVisible = true
      this.showFileName = false
      this.operationType = 'copy'
    },
    tagChange(newTag) {
      newTag = this.cloneComponent(newTag)
      const config = newTag.__config__
      newTag.__vModel__ = this.activeData.__vModel__
      config.formId = this.activeId
      config.span = this.activeData.__config__.span
      this.activeData.__config__.tag = config.tag
      this.activeData.__config__.tagIcon = config.tagIcon
      this.activeData.__config__.document = config.document
      if (typeof this.activeData.__config__.defaultValue === typeof config.defaultValue) {
        config.defaultValue = this.activeData.__config__.defaultValue
      }
      Object.keys(newTag).forEach(key => {
        if (this.activeData[key] !== undefined) {
          newTag[key] = this.activeData[key]
        }
      })
      this.activeData = newTag
      this.updateDrawingList(newTag, this.drawingList)
    },
    updateDrawingList(newTag, list) {
      const index = list.findIndex(item => item.__config__.formId === this.activeId)
      if (index > -1) {
        list.splice(index, 1, newTag)
      } else {
        list.forEach(item => {
          if (Array.isArray(item.__config__.children)) this.updateDrawingList(newTag, item.__config__.children)
        })
      }
    },
    refreshJson(data) {
      this.drawingList = JSON.parse(JSON.stringify(data.fields))
      delete data.fields
      this.formConf = data
    },
    handleCloseDialog() {
      this.$emit('update:draw-dialog-visible', false)
    },
    handleSaveBaseForm() {
      this.handleCloseDialog()
    },
    confCode() {
      // 获取表单配置（字段）
      const tableData = {}
      this.drawingList.forEach((item) => {
        let dictType = null
        const { required, label, tag, noField = false } = item.__config__
        const colName = item.__vModel__
        const { maxlength = 0, format } = item

        if (tag === 'ms-dict') {
          dictType = item['dict-type']
        }

        tableData[colName] = {
          colName: colName.replace(/([A-Z])/g, '-$1').toLowerCase(),
          isForm: true,
          label,
          notBlank: required,
          dictType,
          dateRule: format,
          maxLength: maxlength,
          tableName: this.formId,
          formType: noField ? 'file' : 'model'
        }
      })
      console.log(tableData)
      configTable({ tableData }, this.formId).then((res) => {
        console.log(res)
      })
    }
  }
}
</script>

<style lang="stylus">
@import '~@/styles/home.stylus';
</style>
